Through all the noise and controversy surrounding the return of Army Sgt. Bowe Bergdahl, one thing has remained clear – President Obama is not apologizing for his decision to bring Bergdahl home. “We do not leave anybody wearing the American uniform behind,” he repeated, citing this as a basic American principle.

What about another American principle – refusing to negotiate with terrorists? First explicitly brought up during the Reagan presidency, and again played a leading role in the Bush administration, this principle has been embraced by numerous American politicians as a central tenet of American foreign policy.

But is it true? Take a look at some of the most glaring – as well as some of the least well known – examples of U.S. negotiations with terrorists throughout history.

Despite the bold news headlines, "coming home" isn't as easy as it sounds. Now that Army Sgt. Bowe Bergdahl has been freed, can't he just get on a plane and be on his way to his family? Not so fast. Bergdahl faces much more than a media firestorm as he prepares to re-enter society. POW reintegration, or "decompression" in Army speak, is a tedious process fraught with potential difficulties, especially for Bergdahl.

Prompted by the vast number of returned POWs after the Vietnam War, the Pentagon developed the following protocol. There are three main phases:

President Obama’s poll numbers are up in the Arab and Muslim world after years of decline.

It started off well for the President, five years ago in June 2009, President Obama delivered a speech at Cairo University in Egypt, signaling that his presidency will bring a “new beginning” to U.S. relations with the Arab and Muslim world.

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From the country’s major political and policy issues to diplomacy on the global stage, State of the Union with Candy Crowley brings in the world’s top newsmakers and analysts to deliver the smartest, most comprehensive look at what matters most to you. Sundays at 9am and Noon ET.